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Keywords:

  • Group 15 elements;
  • phosphorus;
  • reductive bond cleavage;
  • zirconium
Thumbnail image of graphical abstract

It's hip to be square: A perfectly planar square of phosphorus atoms is prepared by the reduction of [ZrCl2{PhP(CH2SiMe2NSiMe2CH2)2PPh}] in the presence of P4 (see structure). On the basis of the P[BOND]P single bond lengths and oxidation state of the Zr centers, this unit is formulated as a [P4]4− fragment.